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lorasvet [3.4K]
4 years ago
12

Rays of light coming from the sun (a very distant object) are near and parallel to the principal axis of a concave mirror. After

reflecting from the mirror, where will the rays cross each other at a single point? The rays __________
Physics
1 answer:
Radda [10]4 years ago
4 0

Answer:

The rays will cross at the focal point.

Explanation:

Rays that are parallel and near the principal axis of a concave mirror converge at the focal point after reflecting from the mirror.

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What is the pressure if a force of 200 N is applied over an area of
Gelneren [198K]

The pressure is 4 N / c m^{2}.

Answer: Option A

<u>Explanation:</u>

Pressure defines the force acting per single area. So depending upon the amount of force acting over a given area in the perpendicular direction of the object, the pressure acting on that area will vary.

So the pressure is directly proportionate to the applied force on a particular region and inversely proportionate into the areas of the region. Hence, the unit of pressure is considered as  N / c m^{2} or Pascal. Pressure can also be termed as the number of air molecules present in a specified closed region. Thus, for the present condition

              \text { Pressure }=\frac{\text { Force }}{\text { Area }}

Thus, by appling the given values in the above equation, we get,

              \text { Pressure }=\frac{200}{50} =  4 N / c m^{2}

So the pressure is 4 N / c m^{2}.

6 0
3 years ago
Two identical blocks of iron are placed in contact, one at 10°C and the other at 20°C. If the cooler block cools to 5°C and the
Alenkinab [10]

Answer:

this is violation of II law of thermodynamics

Explanation:

As per 2nd law of thermodynamics we know that heat always flows from high temperature to low temperature

If heat flows from low temperature to high temperature then it is only possible when some external work is done on the system

So here it says that initially two blocks are at 10 degree C and 20 degree C

Now the cool object will become cooler and hot object becomes hotter

which shows that heat is flowing from low temperature to high temperature

So this is violation of II law of thermodynamics

8 0
3 years ago
If a car and a bowling ball were thrown off a 100 foot cliff at the same time, which would hit the ground first?
nirvana33 [79]
They would hit the ground at the same time. No matter the weight laws of physics.
8 0
3 years ago
Please help me!! I already did A,B and C but I don’t know D but if you want to help me with all then it would be great so I can
Inessa [10]

Answer:

350cm^3 =350milliters

4 0
3 years ago
Read 2 more answers
Which two states border Washington, DC? Maryland, West Virginia Delaware, Virginia Delaware, West Virginia Maryland, Virginia
fredd [130]

Answer:

I believe it would be Pennsylvania and New Jersey they both border Maryland. Didn't see any other states that border Maryland with West Virginia and Virginia being exempt from the question.

Explanation:

5 0
3 years ago
Read 2 more answers
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